Best available copn



BEST AVAILABLE'COH July 20 1926. 1,593,049

6. W. TARBET MACHINE FOR MOLDING WINDOW WEIGHTS QR SIMILAR ARTICLESFiled Jan. 29. 1923 s sheets-skim 1 BEST AVAILABLE COP\ Jill 20, 1926.3. 4

C. W. TARBET MACHINE FOR MOLDING WINDOW WEIGHTS 0R SIMILAR ARTICLESFiled Jan. 29. 1923 3 Sheets-Sheet 2 1 I I I 1 i l I /7-, I l I 1 i i lr J 6b is 1/935 wp: Mk W 7 .39

Him .7, uewon' BEST AVAlLABLE'COP:

July 20 1926 1,593,049

c. w. TARBET momma FOR momma wmnow wEmHTs OR SIMILAR ARTICLES Filed Jan.29, 1923 s'sneets-sheets Patented July 20, 1926.

m sstares BEST-.AVAlLABLE COPY Gunmaw} T'A-RBET, 0F CHICAGO,-ILLI1\IO1S;namesake-a n" wines:

COMPANY, or CHICAGO, rumors, A conrona' glon oF, ILLmoIs MACHINE EonMonnmewmnow wmsn'rs onsmrnanjnftrictnsi Application filed January29,1922. Serial No'.' e1 f5,fei's; 1

f This invention'relates to that class 'of machines for molding orforming window weights or similar articles, having one or more lmolds'or mold chambersfand provided with plunger and plunger-operatingmechanism adapted to apply the necessary pressure for compressinga'compositioh or material of'which the window weights or otherarticlesare to be formed, and means for disehargi 'g'the molded articlesfrom the mold'chambers;" y The principal object of theinvent-ion' is'toprovidea" simple, economical and efficient machinefor molding or formingcomposition window weights, or similar articles. 4

Other and further objects of-the invention will "appear from thefollowing description and claims, and-from an inspection. of theaccompanying drawings.

'The invention consists in the features, combinations, details ofconstruction andarrangements of parts and in composition window weightsand the method of making the same, herein described and claimed.

Fig. l is a view in front elevation of a machine for making windowweights or similar articles, constructed in accordance with myinvention;

Fig. 2 is an enlarged detail view in perspective of an improvedsectional composition window weight made in accordance with myinvention;

Fig. 3 is a View in sidd elevation of the machine shown in Fig. 1, as itwould appear when viewed from the left side of said figure;

Fig. 4 is anenlarged view in horizontal section taken on line 4-4, ofFig. '3, looking downward and showing a part of the locking andreleasing mechanism whereby the turntable or movable support upon whichthe molds are mounted is secured and accurately held in the properpositions successively for enabling material to be introduced into andcompressed in the molds and discharged therefrom successively andprogressively;

Fig. 5 is an enlarged view in detail show ing a portion of themold-supporting turntableand one of the molds thereof in verticalscction, taken on line 5-5 of Fig. 7 and with the compressor plunger,shown in full tines in front elevation,extending into the mold chamberand in engagement with the material to be compressed or molded in anddischarged fromsuch chamberi Sa'id'figure also shows a dischargingpl-unger extending into amold and botliin-f'ront e'l'eyation;

- Fig-=6 is a simi-iarwiew shewih' one of the molds in centralverticalsecticn in discharging positiom and-with the discharging plunger-in -"lowered*-position in i said 3 mold, as it would appear'dnthe'operation'of discharging; a window"weight" or mold section,-

Fig; 7 is'an enlarged detail plan viewof oneiof themold-supporting"turntables or table or series;of molds, and for stoppingand releasing the turntable and" molds in such a manner as to permit themolds to be moved intermittently or in a step by step manner intoposition to enable material to be introduced into' ea'c'h' moldsuccessively and compressed and discharged while the mold is stationaryand in propcr' po'sition, and adapted to permit the intermittentmovement of each turntable and its molds while the corresponding plungermechanism is in raised position and out of engagement with the molds,and while the opposite turntable and its molds are stationary. 'And saidfigure also shows an improved means for measuring and feeding materialinto the molds in successive order; and

Fig. 8 is a view in central vertical section'taken on line 8-8, of Fig.7 looking in.

the direction indicated by the arrows approximately, but showing theparts which are shown in elevation as they would appear when viewed atdifferent angles as compared with the angles or directions from whichthe parts shown in section are seen, as'indicated by the irregular line8- 8';' but Fig. 8 shows the parts on a slightly reduced scale ascompared with Fig. 7.

In constructing an improved machine for making or molding-compressedcomposition window weights or similar article in accordance with myinvention, I provide a frame or base 1, upon which is rigidly mounted apair of upright sideframe members 2, 2, each of which comprises a'pairof upright columns or frame members 3, 8, which form supports for aplungeroperating shaft 4, wl'iich is iournalcd in suitable bearings 5 insaid upright columns or frame members 3.

The plunger-operating shaft 4 is, by preference; in the i-formof a crankshaft, having two pairs of crank arms 6 near the o posite extremities ofsaid shaft, each pair eranlarnisheing rovidiaiwith a connectingwrist-pin or crati 5 7.

'The plunger-operating shaft 41 1s operatively connected" with suitabledriving means, such, for example,,,as a main drive shaft 8 journaled in"suitable bearings 3, a .-rr sht 3 are" pe ves connected ithltheshattean er -Qt a r- .g wheel g ljlizredtosaidmain drive shaft and in toothed-engagement with the gear 12. Hr w els-= re-fi ed to the ha t which stwsadar edt be e0.n. ete lwith y suitable, source of; power',or; .drrvmg=means. prefer; to; make the shaft 4 in two separable. se of c i o ns,vtheir; inner Qabutting; ends 8, a d 9fibei g separably coun ct ysuitable means, such, for example,' as;a connect ngmkey 10' mountedin-end' slots 10 and adapted to connect; and cause said sections torostetogether, but permit either or bothofsaid sections-tabs tilted ordislodged from its normal-operative positionin its bearings withoutdistortion or; injury to either cflthe-secti'ensof the shaft or to theother parts of the machine It is very desirabletoenablenthe sections ofthe shaft to be so mounted and supported in suitable bearingshereinafter described, as to provide means for relieving the stressesand strains to which; said'; shaft and the plunger mechanism and molds,or other machine parts, are subjected in use,'to prevent in jury orbreakage; For example, the construction and arrangement of parts hereindescribed and shown including'the separably connected shaft Sections andhearings or supports therefor,- are adapted to relieve the stresses andstrains towhich the parts are subjected in use whenever such stressesand train'become excessive, or greater than can be safely sustained bythe machine or parts without danger of injury or breaka e.

'lhe spur gear wheel 12 is fixed to and connects the inner abutting endsof the separable sections forming the shaft 4, and has ana-xi'ailopening 11 into which the abuttingends of said shaft sections extend.Connected with each crank 6 is a plunger-- operating reciprocating rodor pitman 13, And said cranks are sodisposed that the crank and itswrist pin 7 on one side of the gear wheel 12 and machine will be downand directly beneath the axial center of the shaft a and at the lowerextremity of the path of movement of such crank while the other crank isup and at the upper eX- tremity of its pathof movement, and vice versa.

Operatively connected with each plungeropcrat-ing rod or pitman 13 is areciprocating plunger comprising a plunger-head 1a, which is slidablymounted between opposite parallel ways or guides 15 located on oppositesides of each plungerhead, respect-ively, and adapted to guide thelatterin 'a vertical path of movement-- tab e or bed 19.

I prefer to employ a plurality of mold-- supporting turntables ormovable mold supports 19, one for each compressor plunger 16 and plungeroperating pitman and plunger head, and to mounta set or series ofupright molds 18 in a circular row and equally spaced apart upon eachturntable 19, or in such position upon a movable support that the moldsarc-caused to travel or revolve intermittently or in a step by stepmanner in a path of movement which Wlll bring each mold in its propersuccessive order directly beneath the compressorplunger and dischargingplunger, respectively, in succession, or in a desired predeterminedorder. The set of molds on one side of the machine will thus be heldstationary during the operation of compress ing the material in one moldof such set, and simultaneously discharging a molded article fromanother mold of such set, while the set of molds on the opposite side ofthe machine are being rotated or moved from one plunger-rcceiring oroperative position to another, with the corresponding compressor-plungerand discharging plunger above the level of the path of movement of themolds and in position to permit the movement of the latterintermittently as required.

Each turntable 19 is provided with a vertical spindle or axle 20, and isrotatively supported upon a suitable stationary support or bed 21,having a discharge opening 22 located directly below the level of thepath of movement of the corresponding upright molds 18. (See Fig. 6.)These discharge openings 22 are each in position to receive and depositor discharge into a suitable shute or receptable, not shown, thecomposition window weights or molded window weight sections 23, or otherarticles, as they are discharged from the mold chamber's 24 or molds 18,successively, by the operation of the corresponding discharging plunger17, or by said plungers l7 acting alternately on opposite sides of themachine, or acting to discharge the compressed- 'molded articleszfrom'the: molds, inthe desired predetermined order. (See Figs.'3, 5, and 6.)v1

Each compressor-plunger. 7.16 .is provided with a central or axialdependingpiercing member, pin'or core member. fixed to and projectingdownward beyond the bottom end and inner end compression surface' of thecompressor-1 plunger-16 and adapted to be forced: through the. materialto be molded and compressed in any mold chamber 2i or'mold 18:-in which:such plunger is caused tooperate, so as to form an axial opening 26v inand through each, Window-weight or wi)ndow+weight section 23.3: (SeeFigsl and 5.,-"

.vertical opening 26 is provided in the stationa'rybed. 21,,for:receiving the bottom extremity-of said pin 25 ;of. the corresponding.compressor plunger, when such; plunger is in lowered or compressingposition in mold containing material; to, be compressed and. moldedj ,1;-A:con'necting and supporting. rod. or wire 27,- adapted to;eXte1 1dthrough -,the axial openings 26 in any desired number of composition-window-weight.,sections 23 to be connected and supportedzthereby,so-as-to form awindow-weight consisting. of comprising. any desirednumber of connected sections 23, and of any desired predetermined weightand=length or dimensions, is provided-and inserted through the centralopenings in any-desired number of sections 23, so asto-form asectionalwindow-weight,consisting- -of-any dGSlIBd IllllIlbGl ofsections connected by such rod.-- c (See Fi 2.

-The rod 27 is provided at one end with any ordinary orsuitable-meansfor securely holding the threadedor connected sections 23on the rod, such, for example, as oneor more angular bent end portions28, or other suitable or equivalent securing means adapted to engage thebottom section'231, or any desired one or more of such sections orwindow-weightmembers to be supported on such rod or wire. Each. rod orwire 27 has a'loop or eye 29, or similarelement adapted to be secured toa window cord 30, or similar means for suspending or supporting thewindow weight.

Each window-weight thus comprises a series of connected tapered ortruncatedcone' shaped sections 23, formed of a suitable composition ormaterial molded or compressed and molded as described.

These window-weight sections 23, which are, by preference, tapered ortruncatedcone shaped, are, by preference, so arranged and threaded uponthe central core or rod 27 that the relatively large ends 31 of adjacentsections 23 are in abutting engagement with each other, and therelatively small end 32 of each section 23 is either in abuttingengagement with an opposed small end 32 of. an

BEST AVAlLABLE COPY adjacent section of the same window-weight or inposition to form a tapered exposed end of a window-weight comprising aplurality of such connected truncated-cone shaped or tapered sections.(See Fig. 2.) The sectional window-weight thus formed has slightlytapered or truncated-cone shaped upper and lower end portions orextremities adapted to enable the weight to move freely between guidesor in ways, and without being stopped by obstructions.

Suitable means is provided for supporting and intermittently rotating,and stopping, locking and releasing each of the turntables 19, with themolds supported thereby,-

as required, as follows:

A toothed annular rack or gear 33 is Xed to each turntable 19 by meansof pins 34; and a shaft 35 is connected with each gear 83 by means of asuitable train of gears and suitablelocking and releasing or escapementmechanism adapted to rotate the turntable 19 intermittently or in a stepby step manner While permitting shafts to be rotated continuously.

The upper end of each shaft 35 is operatively connected with theplunger-operating crank shaft 4 by means of a bevel gear wheel 36 fixedto the corresponding end of said crank shaft, and a bevel pinion 37fixed to said upper end of the shaft and in toothed engagement with suchspur gear wheelSti, or by similar or equivalent connecting means.

Each shaft 35,there being one of such shafts for each turntable 19 andsaid shafts being located on opposite sides of the machine,isoperatively connected with the corresponding. toothed rack or gear andturntable 19 by means of an intermediate gear wheei;38, which is intoothed engagement with said gear'wheel 33 on the correspondingturntable, and in toothed engagement with a segmental gear 39, which isfixed to the lower end of the corresponding shaft 35, each of saidshafts being journaled'in suitable bearings d0, $1, on opposite sides ofthe main frame of the machine.

The gear 38 is mounted upon upright stub shaft d2, as shown in Figs. 7and 8. The segmental gear 39 has a smooth or nontoothed segmentalperipheral portion 42- which is out of engagement with the intermediatetoothed gear 38, and has a toothed peripheral portion 44:, which isadapted to operatively engage the teeth of the gear during eachrevolution of the shaft An angular escapement member l5, having threesegmental curved recessed portions or recessed teeth d3. fixe to theintermediategear wheel 38 by means of securing screws s! or othersuitable securing means; and a curved segmental escapement member 418extends along the non-toothed periphery of and is secured to thesegmental toothed gear 39. Securing screws d9, or

other suite-hie" securing-means, ma be employed for-this -'pnrpose. Theperipheral curved margin of said segmental escapeinent member 48 isadapted to extend into I and to operativ'ely engage each curved recessedportion 46 in the adjacent escapement member 415, successiveiy, as theintermediate gear 38 and angular escapement member 45 are rotatedintermittently or in a step by step manner. The constantly rotatingshaft 35-and segmentallocking escape'men't member 48 are'thus adapted torotate the intermediate'gear 3-8 and escapem'ent member 15 intermittntly, and thus cause the corresponding turntable 19 and a series ofmolds 18 thereon to be rotated intermittently or in a step by stepmanner. Each turntable is thus securely looked upon the completion ofeach intermittent movement thereofiin'position to permit thecorrespondingressure and discharging integers to be operated whiie eachturntable is in proper position; and ach turntable is rotatedintermittently' while the opposite turntable is stationary, and viceverse-. v

A supplementary-or auxiliary securing or locking and releasing" means isrovided for each turntable 19, by means 0 which each of said turntablesis accurately locked in exactly the proper stationary position at theproper moment to permitthe pressure and-discharging plungers to'operateand to permit each turntable to be released and rotated intermittently,"as desired.

For this purpose a air of roek'shafts 51 are journaled in suitablebearings 52, on Opposite sides of the machine frame, each adjacent toa'corresponding turntable 19 to be secured and released alternately.Each shaft 51 is provided with a crank arm 53, having an elongated slot54: in its bottom extremity. And a reciprocating connecting rod orplunger 55 is slidably mounted in a suitable stationary support 56, oneend of said rod 55 being provided with atrans verse pin 57 fixed theretoand slidable in the slot 54 inthe bottom forked end of the crank arm 53,and the other or forked end 58 of said reciprocating rod 55 beingprovided with'one or more anti-friction rollers 59 thereon and inoperative engagement with the periphery of an eccentric 60, which isfixed to the shaft 35, already described.

Each rock shaft 51 is also provided with a depending crank arm 61, fixedthereto. And a reciprocating rod or locking pin 62 is pivotally orflexibly connected with the lower extremity of said crank arm 61, andslidably mounted in a suitable bearing or socket 63, in position toextend into and out of securing engagement with peripheral openings orrecesses 65 in the adjacent turntable 19 successively. (See Figs. 3 and4.3

A compressible'spring 66 encircles the locking-pin 62, and is mounted ina suitable BEST AVAILABLE COPY resents recess 1 67 in' the bracket #63,position to yieldingly resist the movement ofthe lock" ingel-pin in thedirection o'f'tlie' turntable' 19, an tend to press 'the' locking pinoutof locking engagement with the turntable and to hold theanti-frictionrolle'r, 59, 'by means of which the crank arms 53 and 61'and locking-pin 62-are move-d: toward'or into locking engagement withthe-turntable l9, inoperative engagement with the "ec centric 60. I

The eccentries 60, located -on"op'posite sides'of the machine, are setin such p'ositi -on":with espeet toeaeh other, that when the 1ockingpin- 62'on -'one side 'of' the ma chine is in locking engagement with ae riphe'ral soeketi or me ses prthe corresponding-turntable" 19,"th'elocking-pints on the opposite sine-of "the maehine will be outof lockingengagement with the-adjacent turntable, and'vieeversaa' l From- -theforegoing :it' will be; readily understood that the turntable" operatingmeahs'and loeking-andaeleasing mechanis above described, is adapted-torotate each of the turntables 19 intermittently or in a step by stepmanneryandthe turntables are rotated alternately -'with respect to eachother and are cash automaticall locked and held stationary during theoperation of introducing material into the molds and compressing anddisehargingmolded material from the molds, and while the oppositeturntable is being rotatemandvice versa.

In order to rovide simple 'a'ndeflici'ent means for automaticallymeasuring and feeding or introducing material into the molds in thedesired quantities and at the proper intervals, I provide an expansibleand collapsible intern'iittentlyrotative measuring and feeding devicewhich is, by preferen'ce, constructed as follows:

A stationary base 68 is mounted upon a suitable support, which may be inthe form of an upright bracket 69 fixed to the machine frame. Thebase-68 is provided with a discharge openin 70 located in position todischarge material into the adjacent mold chamber 24 of each meld 18 onthe corresponding turntable 19, successively,- as the molds are rotatedintermittently;

A rotary feed table 71, having expansible and collapsible measuringchambers or compartments 72 located at equal'dist'ance from each otherand from the axial center of the feed table, is rotatively mounted uponan upright axle or shaft 73, the bottom end of Whic'h'is anchored iiidisease 68 and Sli1- porting bracket 69. The rotary feedtable 71 isprovided with a peripheral toothed rack or gear 7e fixed to andextending entirely around the periphery of said feed table. And anupright feed-table operating shaft 75' is journaled in suitable bearingsin the upright bracket 69 or other suitable support and isoperativelyconnected with the feed table 71 by means. of a sp'ur gear;

wheel 76 fixed tothe upper end of said shaft and in toothedengagementwith the gear 74 and a spur gear wheel 77 fixed to the lower ,end ofsaid shaft 75, and in toothed engagement with, the intermittentlyrotative toothed gear wheel 38, already described. See Figs, 7, and 8.7)i a Each measuring and feeding chamber 72 .SQ and ,tosupport it i inanyfldsii'ed adjusted position. Audit-lie" .platel ;8 0..se1.ves to'llift e my witli it the uppertelescopingftubu larmiembe'rs '78, so, as toincrease or decrease the etl'ectualleiigthand capacity of themeasuringch'ambersj72, as desired.

I Suitable; means is provided forsecuring the upwardly and; downwardly.adjustable nonerotative top plate or hopper lsupport 7 9 in I anydesiredadjusted position.- For this purpose a plurality of uprightstandards or frame arms 81 are fixed to the outer'margin of. thestationary base 68, already described, and are each provided. with anelongated slot 82 in the upper end thereof. And a head ed securing-screw8 3 is anchored in' the up wardly I and downwardly adjustable hoppersupport-79. Each "screw 88' exten'cls' through a slotted'up'perendpor'tion 82 of acorresponding fupright 8,1. The members 7 9 and andupper collapsible tubular members 78 are thus supported in any desiredadjusted position with respectto the rotary feed table 71 and stationarybase 68. i

A feeding hopper 84: is fixed'to the hopper support 79, already.described, and said hopper support 79 is provided witha'supply passageor opening 85 leading from the bot tom of said hopper in position todischarge material from said hopper into each tubular chamber or member78 in successive order, as said tubular members are rotated with respectto said hopper, and with respect to said stationary hopper support 79.

The hopper 84 is, of course, mounted in position to receive materialdischarged from a supply shoot or hopper 86, which may be of any desiredordinary and well known or suitable form of container, or supplyconduit.

From the foregoing it will be readily understood that the hopper 84 androtative feed table 71 are adapted to measure and discharge materialinto each of the molds 18 of the corresponding or adjacent series ofsuch molds during the intervals of time in which the molds arestationary; And the BEST AVAILABLE COPi molds are thus eachvsuccessively chargedwith the roper quantity of material to be compresseor molded therein. v p

In order to provide a simple and efficient safety device, or means forpreventing injury to the machine, in case of the mechanism beingsubjected to excessive stresses and strains from any cause, the journalbearings in which the plunger-operating crank shaft is journaled, areeach provided with a springpressed bearing member 87 whichis held inoperative engagementwith its mating hearing member 88, by means of heavysprings 89, which are interposed between the top plate or stationarymember 90 and said journal bearing member 87. Thetop frame memher orplate 90 is firmly secured in operative position and in'engagement withthe upper extremity of the corresponding spring means of headed bolts91, which are anchored in correspondingstationary bearing members 88,and-- extend through suitable openings in said top plate so as to holdthe top bearing 87 in itsproper operative position under all 'normalc0nditions or at all times whenthe machine is in operation and themembers subjected to normal stresses and strains which are presentduring the operation of the machine under normal conditions, but so asto permit the top bearing member 87 to be pressed upward against thetension of the corresponding spring when the stresses or-strains uponthe plunger-operating crank shaft and its bearings become so excessiveas to render the mechanism liable to injury, as the result ofsuchflexcessive stresses and strains. j In making compositiomwinclowweights in accordance with myinvention, the mold chambers on oppositesides of the machine are charged' with material to be compressed ormolded in such chambers successively and intermittently, first charginga mold chamher on one of the turntables, and then, while compressing ormolding. the material in such chamber, simultaneously charging a moldchamber on the other turntable, and vice versa. Having charged one ormore of the mold chambers on a given turntable and caused. the chargedmold to be moved into position directly beneath the correspondingcompressor-plunger 16, the-plunger is forced down into the moldcompressing the material contained therein, and the mold containing thecompressed material is then moved automatically into position directlybeneath the discharging-plunger 1.7-as shown in Fig. 7 ,thus causing thenext successive charged mold to be moved into position beneath thecompressor-plunger. The compressor-plunger and discharging-plunger arethen operated simultaneously so as to cause material to be compressed inone of said mold chambers while the compressed window weight or moldedarticle in the other mold chamber is being discharged. material is beingcompressed in one of the mold chambers, and

desired material maybe em'ployed which is suitable for being compressedor molded and used in making the window weights or other articles to beproduced.

A very desirable composition, which I have found suitable for makingcomposition window weights" in accordance with my inventiomfconsistssubstantially of the followi 'ig element'sin the proportions indi a ed,y ghhi Four l') p'artsmetal borings, or similar finely divided} metal;five '(5) parts slag in a finely divided condition, and one (1) partPor'tlandfcement. Total ten (10) parts.

I first provide a suitable quantity ofiron borings, or similar finelydivided particles of metal,wl1ieh are saturated with water, bypreference, all the water that the'borings or finely divided metal willabsorb or retain. For. thispurposetour (at) parts of iron bearingsandfive parts of slag, which are thoroughly intermixed and then saturatedwitlrall, the water that said-elements will absorber retain. lltlien addcement, by preference Portland cement in dry form in substantially theproportions of one (1) part cement to nine (9 "or; more parts ofintermixedirpn orsimila'r boring s or finely divided particle'sof'metalor mineral and slag, i v

The elements including this cement and finely divided particles of metaland slag are then thoroughly intermixed, and placed in suitable molds,such for example as the acids above describedand forming part of amachine, such as that herein above described, and then subjected to apressure which may vary. A suitable pressure for the purpose, however,as has been found in practice, may vary according to the character andcondition of the material to be compressed or molded, and according tovarying circumstances. A pressure of from 30,000to 65,000 pounds persquare inch of surface of the compressing face of the compressor plungerhas been found in practice to produce very satisfactory results. But agreater pressure, for example 150,000 pounds per square inch-or more-ismuch more satisfactory and will produce very good results even with drymaterial and no BEST AVAiLABLE COP.-

cement in the composition. er-mtenai to be compressed or molded. And apressure or considerably less than. 30,000 p'oun'ds' per sqirare imh mabe employed under some circiimstance's, for example, when sufficientcement is used, or when the condition of the material operated upon issuch as to enable satisfactory" results to be obtained with less than30,000 pounds pressure per square inch of exposed surface of thematerial operated upon, or of pressure surface of the piston.

It is important that the mold chamber should be tapered, and materiallyWider'at or in the direction of the discharging end of the chamber thanat the receiving end or end into which the piston is inserted. In otherwords, the mold chambers are each progressively wider from end to end ofthe chambers respectively, in the direction of the downward orcompressing movement of the compressor plunger, the side walls of thechambers being, by preference, prowessively wider apart in the direction0 the lower or discharging ends of'the chambers, respectively, ortruncated-cone shaped, and has downwardly and outwardly inclined sidewalls which are adapted to permit the material contained in the moldchamber to be readily forced downward in all parts of the mold chamber"from the relatively narrow upper or receiving end to the lower ordischarging end of the chamber. he frictional resistance afforded bytheside walls of the mold chamber to the movement of the material in themold chamber to a closely compressed and condensed condition, is thusreduced to a minimum, and the particles of material in contact with oradjacent to the peripheral walls of the mold chamber are permitted tomove without being subjected to unnecessary frictional resistance 'bythe mold chamber walls. The particles of material contained in the moldchamber are thus permitted to move into compact, closely compressed orcondensed condition in all parts of the mold chamber, thus forming acompressed, closely condensed, heavy composition window weight, or otherarticle, all parts of which are in uniformly compressed and condensedadhesive engagement or contact, and of the desired uniform density,weight, and tegree of hardness. The mass of material thus compressed andmolded by being subjected to pressure in a mold adapted to enable thepressure to act upon the particles of material throughout all parts ofthe mold, is of greater density throughout all parts of the compressedand molded article; and the composition or compressed and condensedmaterial is homegenous and of more uniform density than can be obtainedby the same pressure Without such a. tapered mold.

The material is, by preference, subjected so that each chamber istapered to the 'desired degree of pressure in the mold while thematerial is only partially saturated with water or liquid, and whilesaid material to be compressed is in a finely divided condition andwithout suflicient water to completely saturate the cement,- or otherfinely divided material either with or without cement-or to completelyhydrate the cement. Pressure is thus applied and the mixture orcomposition is compressed while without sufiicient moisture to cause thecement to completely set, or to completely hydrate or saturate thefinely divided mate rial or cement.

After the pressure has been applied and removed, thev compressedmaterial or composition is removed from the mold, and may be allowed todry. In cases in which cement is contained in the-compressed material,the cement is allowed to dry and set; or it may be allowed to firstpartially dry I by being allowed to stand for a suitable predeterminedperiod of time, for example, from six to twenty-four hours more or lessaccording to circumstances and the character and conditions of thematerial, thus allowing the cement to partially set, and then againmoistening the material to a suflicient extent to completely saturatethe cement, or to any desired extent, and then allowing the material todry and'the cement to set.

While I have described materials or elements and a process or method oftreating the same, by means of which a composition suitable for makingwindow weights, or other articles, may be produced and compressed ormolded, in accordance with my invention, and have described acomposition which has been found in practice to give very satisfactoryresults, I contemplate the employment of the elements mentioned orsimilar or equivalent materials in proportions which may vary underVarying conditions and circumstances. And the machine herein describedand claimed is, of course adapted to be used for compressing and moldingor operating upon any desired suitable material, and for producing anydesired articles or products, And I do not confine or limit the scope ofthe invention or inventions herein described and claimed, in any respectotherwise than as set forth in the claims.

And, although one of the principal objects to be accomplished by the useof the heavy fiat springs 89 and the spring-pressed hearing members 87is to prevent injury or breakage and to relieve or ave-id excessivestresses and strains upon the machine or its parts, it will be readilyunderstood that said springs 89 and spring-pressed journal bearingmembers 87,- being constructed and arranged as shown and described, andwith a central shoulder or boss 92 on each bearing member 87 inengagement with the face of BEST AVAILABLE COPY the bottom one of acorresponding set of spring members 89, and with side shoulders orbosses 93 on each top plate 90 in contact with the side marginalportions of the top spring member 89 of the corresponding set ofsaidsprings or resilient means, a pressureregulating means is thusobtained whereby any desired predetermined pressure may be obtained, andwhereby the compression and density of the material operated upon can becontrolled and regulated by regulating and controlling the tension ofthe springs or resilient means.

In order to accomplish this, it is only necessary to provide springs 89of suitable dimensions and strength to yieldingly hold'the journalbearing members 87 in operative engagement withithe journal portions ofthe shaft 4: in such a manner as to permit but yieldingly resistthedesired slight tilting or upward movement the shaft or a part of thesame, whenever theTles-ired predetermined degree of pressure upon thematerial operated upon has been reached or obtained, and not until suchdesired degree of pressure has been reached orexceeded. Y a

The bolts 91, with the nuts 94 in threaded engagement therewith, asshown in Figs. 1 and 3, provide convenient means for controlling andregulating the tension of the springs 89 or resilient meansr And it isobvious that the bolts and nuts thus employed in connection with theresilient means and yielding journal bearing parts, are

adapted to serve as a safety device, being of.

sufiicient. strength vto sustain the stresses and strains to which theparts are subjected under normal conditions in use, even thoughthestrains upon the parts are sufiicient to cause the springs to yieldto the desired extent, but said bolts and nuts being so constructed andconnected as to yield or break and relieve the stresses and strains uponthe shaft 4 or other parts, when such stresses and strains exceed normalrequirements toan extent which will render the machine or some of itsparts liable to injury or breakage.

Iclaim;

1. In a machine of the class described,

the combination of a mold forming a mold chamber, a reciprocatingcompressor plunger movable into and out of said mold chamher and adaptedto compress material contained in said chamber, a piercing member fixedto and projecting beyond the end and inner end compression surface ofthe compressor plunger and adapted to extend through the material in themold chamber to form a perforation through said material, means foroperating said plunger, and discharging means operatively connected withsaid plunger and adapted to discharge compressed material from said moldchamber.

2. In a machine of the class described,

the combination of a mold forming a mold chamber, a reciprocatingplunger head, a compressor plunger and a discharging plunger both fixedto said plunger head and supported thereby in fixed relation to eachother, said compressor plunger being movable into and out of saidchamber and adapted to compress material contained in the same, apiercing member fixed to and projecting beyond the end and inner endcompression surface of the compressor plunger and adapted to extendthrough the material in the mold chamber to form a perforation throughsaid material, and means for introducing said plungers into said moldchamber successively. I

3: In a' machine of the class described, the combination of a moldforming a mold chamber, a reciprocating plunger head, a compressorplunger and a discharging plunger both'fixed to said plunger head andsupportedthereby in fixed relation to each other, said compressorplunger being movable into and out of said chamber and adapted tocompress material contained in the same, a piercing member fixed to andprojecting beyond the end and inner end compression surface of thecompressor plunger and adapted to extend through the material-in themold chamber to form a perforation through said material, means foroperating said plunger head, and supporting means adapted to'movablysupport said mold chamber in position to receive said plungerssuccessively.

4. In a machine of the class described, the combination of a moldmovably mounted and provided with a mold chamber, a reciprocatingplungerhead, a compressor plunger and a discharging plunger both fixed to saidplunger head and supported thereby in fixed relation to each other, saidcompressor plunger being movable into and out of said mold chamber andadapted to compress material contained in the same, a piercing memberfixed to and projecting beyond the end and inner end compression surfaceof the compressor plunger and adaptedto extend through the material inmold chambertoform a perforation flamgusaa material, means for operatingsaid} plunger-head, and means for moving saidmold chamuer into positionto receive said plungers successively.

' 5, In a machine'of the class described, the combination of amovablemold forming a mold chamber-,a reci rocating-plungerhead, acompressor plunger and a discharging plunger both fixed to said plungerhead and supported thereby in fixed relation to each other,saidcompressor' plunger being movable ifitoand out of said moldchamber,a'pierc'irig member fixed to and projecting beyo'fld'the end and innerend compression surface of the compressor plunger and adapted to extendthrough the material in the mold chamber to form a perforation throughsaid material, a plunger-operating shaft rotativelly mounted andoperatively connected with said plunger head, and means for moving saidmold chamber into position to receive said plungers successively.

6. In a machine of the class" described, the combination of a moldform-ing a mold chamber, a reciprocatingplunger head, a compressorplunger anda discharging plunger both fixed-to said plunger head andsupported thereby in fixed relation to each other, said compressorplunger beingmovable into'and' out of saidmold chamber, a piercing member fixed to and projecting beyond the end and inner end compressionsurfaceof the compressor plunger and adapted toextend through thematerial in the mold chamber toform aperforation through said material,-a plunger-operating shaft rotatii ely mounted,- operatively connectedWith'said plunger head,- and supporting means/adapted to movably supportsaid mold chamber in position to receive said plungers successively, U

7. In a machine of the class described, the combination of a moldmovably mounted and forming a mold chamber, a reciprocating plungerhead; a compressor plunger and a discharging plunger both fixed to saidplunger head and supported thereby in fixed relation to each other, saidcompressor plunger being movable into and-out of said movable m'oldchamber, a piercing member fixed to and projecting beyond the-end andinner end compression surface of the compressor plunger and adapted toextend through the material in the mold chamber to form a perforationthrough said material, a plunger-operating shaft rotatively mounted andoperatively connected with said plungers, and means for moving said moldchamber into the path of movement of each of said plungers successively.

8. In a machine of the class described,

the combination of anio-vable mold forming a mold chamber having adischarge opening, a reciprocating plunger head, a compressor plungerand a discharging plunger both fixed to said piunger head and supportedthereby in fixed relation to each other, said compressor plunger beingmovable into and out of said mold chamber, a piercing member fixed toand projecting beyond the end and inner end compression surface of thecompressor plunger and adapted to extend through the material in'themold chamber to form a perforation throu h said material, means forintroducing sai plungers into said mold chamber successively, and meansfor alternately opening and closing the discharge opening of said moldchamber.

9. In a machine of the class described, the

combination of a movable mold forming a mold chamber having a dischargeopening, a reciprocating plunger head, a compressor plunger and adischarging plunger both fixed to said plunger head and supportedthereby in fixed relation to each other, said compressor plunger beingmovable into and out of said mold chamber, a piercing member fixed toand projecting beyond the end and inner end compression surface of thecompressor plunger and adapted to extend through the material in themold chamber to form a perforation through said material,-

for discharging compressed material from said mold chamber, aplunger-operating shaft rotatively mounted and operatively connectedwith said plungers, means for moving said mold chamber into the path ofmovement of each of said plungers successively, and means foralternately openin and closing the discharge opening of sai moldchamber.

10. In a machine of the class described, the combination of a movablemold forming a mold chamber having a discharge opening, a reciprocatingplunger head, a compressor plunger and a discharging plunger both fixedto said plunger head and supported thereby in fixed relation to eachother, a piercing member fixed to and projecting beyond the end andinner end compression surface of the compressor plunger and adapted toextend through the material in the mold chamber to form a perforationthrough said material, a plunger-operating shaft rotatively mounted,means for operatively connecting said shaft with said plungers, meansfor moving said mold chamber into the path of movement of each of saidplungers successively, and a bed forming a closure for said moldchamberwhen the latter is in the path of movement of the compressor plunger,and adapted to permit the discharge of compressed molded materialthrough the discharge opening of the mold chamber when said chamber isin position to admit the discharging plunger.

11. In a machine of the class described, the combination of a movablemold forming a mold chamber having a discharge opening, a reciprocatingplunger head, a compressor plunger and a discharging plunger both fixedto said plunger head and supported I thereby in fixed relation to eachother, said compressor plunger being movable into and out of said moldchamber, a piercing mem ber fixed to and projecting beyond the end andinner end compression surface of the compressor plunger and adapted toextend through the material in the mold chamber to form a perforationthrough said material plunger-operating means adapted to introduce saidplungers into said mold chamber successively, means for movin said moldchamber into the path of iiiive SEST AVAlLABLE COPY ment of each of saidplungers successively, and means forming a closure for said mold chamberwhen the latter is in position to rece1ve the compressor plunger, saidclosureforming means being adapted to permit the discharge of compressedmolded material through the open discharge opening of said mold chamberwhen said chamber is in position to receive the discharging plunger.

12. In a machine of the class described, the combination of a movablemold forming a mold chamber having a discharge opening, a reciprocatingplunger head, a compressor plunger and a discharging plunger both fixedto said plunger head and supported thereby in fixed relation to eachother, said compressor plunger being movable into and out of said moldchamber, a piercing member fixed to and projecting beyond the end andinner end compression surface of the compressor plunger and adapted toextend through the material in the mold chamber to form a perforationthrough said material, plunger-operating means operatively connectedwith said plunger head and adapted to introduce said plungers into saidmold chamber successively, means for moving said mold chamber into thepath of movement of each of said plungers successively, and a bed insupporting engagement with said mold and adapted to form a closure forsaid mold chamber when the latter is in position to receive thecompressor plunger, said bed being adapted to permit the dischargeopening of said mold chamber to be open to permit the discharge ofcompressed molded material when said mold chamber is in position toreceive the discharging plunger.

13. In. a machine of the class described, the combination of a movablemold forming a mold chamber having a discharge opening, a reciprocatingplunger head, a compressor plunger and a discharging plunger both fixedto said plunger head and supported thereby in fixed relation to eachother, said compressor plunger being movable into and out of said moldchamber, a piercing member fixed to and projecting beyond the end andinner end compression surface of the compressor plunger and adapted toextend through the material in the mold chamber to form a perforationthrough said material, plunger-operating means operatively connectedwith said plunger head and plungers, means for moving said mold chamberinto the path of movement of each of said plungers successively, astationary bed in engagement with said mold and adapted to form aclosure for the discharge opening of said mold chamber when said chamberis in position to receive the compressor plunger, said bed being adaptedto permit the opening of the said dist arge opening when said and achambe is in pestion a receive the discharging p eager, an, means an ascuring said mold in the path of movement of each of said plungerssuccessively.

14. In a machine of the class described, the combination of a moldforming a mold chamber having a discharge opening, a movable support forsaid mold, a compressor plunger movable into and out of said moldchamber, a piercing member fixed to and projecting beyond the end andinner end compression surface of the. compressor plunger and adaptedto'extendthrough the material in the mold chamber to'form aperforationlhrough said material, plungerope'rating'meansconnected withsaid plunger head and pluhgera'meansfor operating said movable supportintermittently, to cause said mold chamber to be' moved into'the path ofmorement bf each of said plungers successively,a bed in engagement withthe bottom of said mold and adapted to form a closuredorfsaid dischargeopening when said mold c'ham'beris in position to receive saidcompressor plunger, said bed being adapted to permitthe said dischargeopeningto be 'open' when said mold chamber is in discharging position,and means for remora-bly securing said mold in the path of movement ofeach of said plungers successively. V 7

15'. In a machine of the class described, the combination of amoldforming a mold chamber having a discharge opening, a reciprocatingplunger head, a. compressor )lunger and a discharging plunger both fixedto said plunger head and supported thereby in fixed relation to. eachother, said compressor plunger being movable into and out of said moldchamber, a piercing member fixed to and projecting beyond the end andinner end compression surface of the compressor plunger and adapted toextend through the material inthe mold chamber to form a perforationthrough said material,

means for introducing said plungers into said mold chamber successively,means adapted to form a closure for the discharge opening of said moldchamber when said chamber is in position to receive the compressorplunger, said closure-forming means being adapted to permit thedischarge opening to be open when said mold chamber is in dischargingposition, means for removably holding said mold stationary in the pathof movement'of each of said plungers successively, and means forintroducing material into the mold.

16. In a machine of ,the'class described, the combination of a movablemold forming .a 'mold. chamber having a discharge opening, areciprocating plunger head, a compressor plunger and a dischargingplunger both fixed to said plunger head and supported thereby in fixedrelation to each other, said compressor plunger being movable into andout of said mold chamber, a

BEST AVAlLABLE CD piercing member fined to and projectingbeyond the endand inner end compression surface of the compressor plunger and adaptedto extend through the material in the mold chamber to form aperformation through said material, plunger-operating means operativelyconnected with said plunger head, an intermittently rotativemold-positioning member in engagement with said mold, means for rotatingsaid intermittently rotative mold positioning member in a stepby-stepmanner, and means for auto matica-lly locking said intermittentlyrotati-ve mold positioning member in different locked positionssuccessively.

17. In a machine of the class described, the combination of a pluralityof movable molds each forming a mold chamber, a reciprocating plungerhead, a compressor plunger, a piercing member fixed toand projectingbeyond the end and inner end compression surface of the compressorplunger and adapted to extend through the material in the moldchamber toform a perforation through said material, and a discharging plunger bothfixed to said plunger head and supported thereby in fixed relation toeach other, a plunger-operating shaft rota-tively mounted andoperatively connected with said plunger head, an intermittently movablemold-positioning member in engagement with each of said molds, meansoperatively connected with said plunger-operating shaft and with saidintermittently movable mold-positioning member and adapted to actuatethe latter intermittently, and means for locking said intermittentlymovable mold-positioni-ng member in diit'erent locked positionssuccessively.

18. In a machine of the class described, the combination of a pluralityof pairs of plungers, each paircomprising a compressor plunger and adischarging plunger, a rotative plunger-operating shaft operativelyconnected with said plungers, a set of molds for each of said pairs ofplungers, each of said molds forming a mold chamber having a dischargeopening, a plurality of intermittently movable mold-positioning memberseach adapted to remain stationary during the movement of the other, andeach being in operative engagement with a different set of said molds,actuating means operatively connected with said plungeroperating shaftand with said intermittently movable mold-positioning membersrespectively, for actuating said mold-positioning membersintermittently, to cause each of said molds to be moved into the path.of movement of each of a corresponding pair of said plungerssuccessively, and means for opening and closing the discharge openingsof said mold chambers.

19. In a machine of the class described, the combination of a pluralityof pairs of plunger-s, each pair comprising a compressor plunger and adischarging plunger, a rotative plunger-operating shaft operativelyconnected with both pairs of said plungers, a set of molds for each pairof said plungers, each of said molds forming a mold chamber having adischarge opening, a plurality of intermittently rotative'moldpositioning members each adapted to re main stationary during themovement of the other, and each being in operative engagement with acorresponding set of said molds, actuating means operatively connectedwith each of said intermittently rotative mold positioning membersrespectively, said mold-positioning means being adapted to cause each ofsaid molds to be moved into the path of movement of each of acorresponding pair of plungers in predetermined order, and means foropening and closing the discharge openings of said mold chambers inpredetermined order.

20. In a machine of the class described, the combination of a pluralityof pairs of plungers, each pair comprising a compressor plunger and adischarging plunger, a rotative plunger-operating shaft operativelyconnected with both of said pairs of plungers and adapted to operate thesame in a predetermined order, a set of molds for each pair of saidplungers, each of said molds forming a mold chamber having a dischargeopening, a pluralityoof intermittent ly rotative mold-positioningmembers each adapted to remain stationary during the movement of theother, and each being in operative engagement with a correspondingBEi'ST AVAlLAfiLE CGPE set of said molds, actuating means operativelyconnected with each of said intermittently rotative mold-positioningmembers and with said plunger-operating shaft, for actuating said moldpositioning members in predetermined order intermittently, andstationary mold-engaging means adapted to open and close the dischargeopenings of said mold chambers in predetermined order.

21. In a machine of the class described, the combination of a pluralityof pairs or" plungers, each comprising a compressor plunger and adischarging plunger, a rotative plunger-operating shaft operativelyconnected with said plungers, a set of molds for each pair of saidplungers, each of said molds forming a mold chamber having a dischargeopening, a plurality of intermittently rotative mold-positioning memberseach adapted to remain stationary during the movement of the other, andeach being in operative engagement with a corresponding set of saidmolds, actuating means 0peratively connected with said intermittentlyrotative mold-positioning members for actuating the same intermittentlyin predetermined order, means for locking each of said intermittentlyrotative mold-positioning members in predetermined order, and stationarymold-engaging means adapted to open and close the discharge openings ofsaid mold chambers in predetermined order.

Signed at Chicago, in the county of Cook and State of Illinois this 25thday of January, 1923.

CLARENCE W. TARBET.

